一个死锁的例子

package com.threads;
/**  
 * Package: com.threads  
 *  
 * File: MainMethod.java   
 *  
 * Copyright @ 2015 Corpration Name  
 *   
 */
public class MainMethod {

	public Object objA;
	public Object objB;
	
	public MainMethod() {
		objA = new Object();
		objB = new Object();
	}
	
	
	public void StartThreads(){
		ThreadA a = new ThreadA();
		ThreadB b = new ThreadB();
		a.start();
		b.start();
	}
	
	class ThreadA extends Thread{
		public void run(){
			synchronized (objA) {
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized (objB) {
					
				}
			}
		}
		
	}
	class ThreadB extends Thread{
		public void run(){
			synchronized (objB) {
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				synchronized (objA) {
					
				}
			}
		}
	}
	
	public static void main(String[] args){
		MainMethod m = new MainMethod();
		m.StartThreads();
		
	}
}